Hey what if people who ate meat would grab handfuls of hamburger and run up to famous Vegans and just 'thwap' it all right in their face and then bend over a little and menacingly stick their finger out and admonish, "Yeah! And that's what you get for being a vegan you pig!!"

I'm imagining them getting arrested, half laughing half resisting as they carried off. The famous vegan stands still. He/She is still in shock (unless Lady Gaga) while they try to use their limp-wristed hands to wipe all that ground chuck out from their nostrils.